/* sección/css/index.css
   Login limpio, responsive, sin “todo gigante”.
   Paleta: blanco/negro + degradé animado sutil.
*/

:root{
  --bg:#ffffff;
  --text:#0b0b0b;
  --muted: rgba(0,0,0,.62);
  --line: rgba(0,0,0,.14);
  --line2: rgba(0,0,0,.10);
  --shadow: 0 18px 60px rgba(0,0,0,.10);

  --r: 18px;
  --r2: 14px;

  --fs: 14px;
  --fsSm: 12.5px;
  --fsXs: 12px;

  --maxCard: 520px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  font-size: var(--fs);
}

/* Fondo animado (solo blancos/negros) */
.bg{
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 15% 20%, rgba(0,0,0,.06), transparent 60%),
    radial-gradient(800px 520px at 85% 30%, rgba(0,0,0,.045), transparent 58%),
    radial-gradient(1000px 650px at 50% 110%, rgba(0,0,0,.04), transparent 62%),
    linear-gradient(120deg, rgba(0,0,0,.02), rgba(0,0,0,.00), rgba(0,0,0,.02));
  animation: drift 10s ease-in-out infinite alternate;
  z-index: -1;
}

@keyframes drift{
  0%{
    filter: blur(0px);
    transform: translate3d(0,0,0) scale(1);
  }
  100%{
    filter: blur(.2px);
    transform: translate3d(-8px, -10px, 0) scale(1.02);
  }
}

.wrap{
  min-height: 100vh;
  display:grid;
  place-items: center;
  padding: 24px 14px;
}

/* Card */
.card{
  width: min(var(--maxCard), 100%);
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  padding: 18px;
}

/* Header */
.head{ padding: 4px 4px 10px; }

.brand{
  display:flex;
  align-items:center;
  gap: 14px;
}

.mark{
  width: 56px;
  height: 56px;
  border-radius: 16px;
  border: 1px solid var(--line2);
  display:grid;
  place-items:center;
  background: #fff;
  box-shadow: 0 12px 26px rgba(0,0,0,.08);
  overflow:hidden;
  flex: 0 0 auto;
}

.mark img{
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.brandText h1{
  margin:0;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.3px;
}

.brandText p{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: var(--fsSm);
}

/* Divider */
.divider{
  height: 1px;
  background: var(--line2);
  margin: 10px 0 14px;
}

/* Form */
.form{
  display:grid;
  gap: 12px;
}

.field{
  display:grid;
  gap: 7px;
}

.field > span{
  font-size: var(--fsSm);
  color: var(--muted);
}

input{
  width:100%;
  border: 1px solid var(--line);
  border-radius: var(--r2);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  padding: 11px 12px;
  transition: box-shadow .18s ease, border-color .18s ease, transform .18s ease;
}

input::placeholder{ color: rgba(0,0,0,.35); }

input:focus{
  outline:none;
  border-color: rgba(0,0,0,.28);
  box-shadow: 0 12px 30px rgba(0,0,0,.10);
  transform: translateY(-1px);
}

.passRow{
  display:flex;
  align-items:stretch;
  gap: 10px;
}

.passRow input{ flex: 1 1 auto; }

.btn{
  border: 1px solid var(--line);
  background:#fff;
  color: var(--text);
  padding: 11px 12px;
  border-radius: 14px;
  cursor:pointer;
  user-select:none;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease, opacity .16s ease;
  position: relative;
  overflow:hidden;
  font-size: 13px;
  min-width: 0;
}

.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(0,0,0,.10);
  border-color: rgba(0,0,0,.22);
}

.btn:active{ transform: translateY(0) scale(.99); }

.btn.primary{
  background: #111;
  color:#fff;
  border-color: rgba(0,0,0,.32);
  font-weight: 600;
  letter-spacing: .2px;
}

.btn.ghost{
  background: transparent;
}

.btn.small{
  padding: 11px 12px;
  width: 88px;
  flex: 0 0 auto;
  border-radius: 14px;
}

.btnFx{
  position:absolute;
  inset:0;
  background: radial-gradient(160px 70px at var(--x,50%) var(--y,50%), rgba(255,255,255,.18), transparent 60%);
  opacity:0;
  transition: opacity .18s ease;
  pointer-events:none;
}

.btn.primary:hover .btnFx{ opacity: 1; }

.msg{
  margin: 2px 0 0;
  min-height: 18px;
  font-size: var(--fsSm);
  color: var(--muted);
}

/* Hint */
.hint{
  margin-top: 4px;
  display:flex;
  align-items:center;
  gap: 8px;
  color: var(--muted);
  font-size: var(--fsSm);
}

.dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.25);
  background: rgba(0,0,0,.08);
}

/* Footer */
.foot{
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line2);
  color: var(--muted);
  font-size: var(--fsSm);
  display:flex;
  justify-content:center;
  gap: 8px;
}

/* Responsivo fino */
@media (max-width: 420px){
  .card{ padding: 14px; border-radius: 16px; }
  .brandText h1{ font-size: 20px; }
  .mark{ width: 52px; height: 52px; border-radius: 14px; }
  .mark img{ width: 42px; height: 42px; }
  .btn.small{ width: 76px; }
}